Gruesome Science Revision

Disease

Any condition that impairs the normal activity of an organism

Infectious

Caused by an agent that can be passed from one organism to another

Non-infectious

Can be inherited, caused by deficiencies or toxins. Not passed between organisms

Contagious

Able to spread easily

Non-contagious

Unable to spread easily

Pathogenic organism

An organism that causes disease in another organism

The agents of disease

Bacteria, viruses, fungi, parasites

Bacteria

Microscopic, unicellular, rapidly multiplying organisms

Viruses

Non-cellular pathogens that reproduce using it’s hosts cells

Fungi

Unicellular or multicellular organisms that feed off nutrients in their environment

Parasites

Organisms that require another organism to survive

Host

An organism that a parasite feeds off

Vector

An organism that transmits pathogens between/to humans

Binary fission

The process of a cell dividing in two

B-Cells

Cells that make antibodies for specific pathogens

Antibodies

Protiens that lock onto specific pathogens and render them useless

Killer T-Cells

Destroy virus-infected cells

Vaccines

Chemicals made from dead/weakened pathogens made to familiarise your body with that pathogen